Rock cutting assembly

US11274497B2 · kind B2 · utility

Assignee

• Joy Global Underground Mining LLC · US

Inventors

• Nagy Daher · Parramatta, AU
• Stuart Reeves · Cheltenham, GB
• Simon Fransen · Sydney, AU
• Eddy Bagnall · Gilgandra, AU
• Andrew Michael Clayton · Kiama, AU
• Christian Baloch · Hill Top, AU
• Richard Boyd · Wollongong, AU

Key dates

• Filing date: Jul 25, 2019
• Grant date: Mar 15, 2022
• Expiry date: Jul 25, 2039

Classification

• Technology area (CPC —): General

Abstract

A cutting assembly is provided for a rock excavation machine having a frame. The cutting assembly includes a boom, a cutting device, and a plurality of fluid actuators. The boom includes a base portion and a movable portion. The base portion is configured to be supported by the frame, and the movable portion is supported for sliding movement relative to the base portion in a direction parallel to a longitudinal axis of the base portion. The boom includes a wrist portion pivotably coupled to the movable portion at a pivot joint. The cutting device is supported on a distal end of the wrist portion. The fluid actuators are coupled between the base portion and the wrist portion. The fluid actuators are operable to move the movable portion and the wrist portion parallel to the longitudinal axis, and are also operable to bias the wrist portion against cutting loads exerted on the cutting device.